<!DOCTYPE html>
<link rel="help" href="https://www.w3.org/TR/scroll-animations-1/#viewtimeline-interface">
<html>
<!-- crbug.com/1470522 --->
<script>
    function main() {
        var b = document.createElement("br");
        document.body.append(b);
        new ViewTimeline({ subject: b });
    }
</script>
<body onload=main()>
</body>
</html>
